I fixed it!
![Grin ;D](https://www.bachmanntrains.com/home-usa/board/Smileys/default/grin.gif)
All it was was a screw holding in the frame to the chassis. It was loose, causing the gears to not fully mesh, and thus grinding against each other.
Thanks for the help everyone!
![Grin ;D](https://www.bachmanntrains.com/home-usa/board/Smileys/default/grin.gif)
![Grin ;D](https://www.bachmanntrains.com/home-usa/board/Smileys/default/grin.gif)
All it was was a screw holding in the frame to the chassis. It was loose, causing the gears to not fully mesh, and thus grinding against each other.
Thanks for the help everyone!
![Smiley :)](https://www.bachmanntrains.com/home-usa/board/Smileys/default/smiley.gif)